Shops, Barns, Varmints, and Trucks - 98 Chevy Silverado speedometer

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98 Chevy Silverado speedometer

Printed From: Unofficial Allis
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Forum Name: Shops, Barns, Varmints, and Trucks
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=207192
Printed Date: 22 Jun 2025 at 6:34pm
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Topic: 98 Chevy Silverado speedometer

Posted By: thendrix
Subject: 98 Chevy Silverado speedometer
Date Posted: 22 Jun 2025 at 10:59am

My mama has a 98 Silverado and the speedometer is WAY off. Washing around the driveway it reads 90 to 100 and after stopping it sits on 100. Any thoughts? It's a 5.7 auto. I'm guessing either a 4L60E or maybe 4L80 transmission?

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"Farming is a business that makes a Las Vegas craps table look like a regular paycheck" Ronald Reagan

Replies:

Posted By: ekjdm14
Date Posted: 22 Jun 2025 at 11:23am

Does the gauge reset cycling the key off/on? Back to zero OK if it does?

First thought would be bad electrolytic capacitor somewhere in the cluster, if the gearbox is behaving OK. The "capacitor plague" is usually cited as >99-07 but my experience says surface mount electrolytics from about '93 to about 2000 were actually the worst.

Otherwise, I've heard Chevys suffer with stepper motor failure in the clusters but not sure which years/models were affected. No direct experience since they're kinda rare in the UK lol

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Stuck Farmer

Posted By: thendrix
Date Posted: 22 Jun 2025 at 1:16pm

If I remember right the needle was on zero when I got in the truck but I don't remember paying attention. I would like to think if it wasn't on zero I would have noticed I hope

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"Farming is a business that makes a Las Vegas craps table look like a regular paycheck" Ronald Reagan